This Concrete Is So Hot It Will Literally Catch Fire: An article about outdoor ready concrete and it’s ability to burn itself.
Scientists are working on a new kind of concrete that actually uses sunlight to help it harden, which could save money and energy, as well as help reduce pollution. The material is made from a mixture of Portland cement and titanium dioxide, which acts like a chemical sponge. When exposed to ultraviolet light, the titanium dioxide begins to absorb carbon dioxide, which then reacts with the concrete to make calcium carbonate. That process helps strengthen the material even further. This could be valuable in places where mixing concrete is difficult, such as remote locations or on the moon.
Scientists are working on a new kind of concrete that actually uses sunlight to help it harden, which could save money and energy, as well as help reduce pollution. The material is made from a mixture of Portland cement and titanium dioxide, which acts like a chemical sponge. When exposed to ultraviolet light, the titanium dioxide begins to absorb carbon dioxide, which then reacts with the concrete to make calcium carbonate. That process helps strengthen the material even further. This could be valuable in places where mixing concrete is difficult, such as remote locations or on the moon.
A new type of concrete developed by researchers at the University of California, Berkeley and Lawrence Berkeley National Laboratory has been found to be self-healing, which is great. But it also happens to be flammable. Which means that if you drop a lit match into a sample, it will catch fire and burn like a candle for about two hours. That’s neat.
But really, that’s not why you should use the stuff. In fact, the self-healing properties are far more important than its ability to burn itself for 120 minutes without any external fuel source. As the researchers explain in their paper, published in Nature Communications on Monday, the concrete is able to heal itself thanks to bacteria that are embedded inside of it during production. When cracks form in the cement, air and water seeps into them and wakes up those bacteria, which excrete limestone when they eat nutrients in the water. That limestone then fills up those cracks. The self-healing process occurs over a period of three years, essentially repairing any damage done to the concrete over time.
The team discovered that this concrete was flammable while testing its thermal stability. “It was almost like a candle,” said senior author of the study Michelle Pelletier as she described watching a
A new concrete that is designed to be used outside and can resist fire, heat, cold and even an ice age is a step closer to being used in the real world.
The material has been described as the strongest known material for standing up to fire and its creators are working on ways to make it commercial.
The concrete could be used for buildings, bridges and tunnels around the world so that they can withstand fires.
It is non-toxic and will not release any gases or fumes when it does catch on fire.
Professor Ole Mejlhede Jensen from Aalborg Portland in Denmark told Reuters that it was a “revolutionary” discovery.
“If you have a temperature of 1,000 degrees Celsius then the strength of this material only drops by ten percent,” he said.
“So if you compare this with normal concrete which loses 50 percent of its strength at 100 degrees Celsius you can see that this is a very different material.” The secret behind the incredible properties is an ingredient called calcium-silicate-hydrate (C-S-H) which forms when cement reacts with water.
If you live in the northern hemisphere, then you know that cold weather is coming. While you might opt to move south, there’s something far cooler you can do: build your own fire pit with self-igniting concrete.
Well, it’s not technically concrete. But this superhydrophobic material is made from a mix of cement, plaster and acrylic paint that when dry will repel water and burn like a candle when ignited.
YouTuber Grant Thompson of “The King of Random” whipped up the recipe during one of his recent experiments. And as he demonstrates in the video below, the stuff is nearly indestructible.
As for how it works, Thompson explains: “The calcium carbonate in the cement combines with the carbon dioxide in the air to form calcium oxide and carbon monoxide.” Basically, it’s a stone that burns itself when exposed to oxygen for long enough.
The secret of fire-resistant concrete is its insulation. The porous concrete keeps the outside surface cool, even if the core is red-hot for as long as four hours. It works like a giant heat sink, spreading out the extreme temperature inside the material to gradually release it into the air over time.
The problem with most concrete is that it expands when it gets hot, and if the internal temperature rises past 2,550 degrees Fahrenheit, it will crack. When you have an exposed interior surface of glowing concrete, you don’t want to see cracks forming with each new temperature increase.
The new material’s secret ingredient is a mineral called bauxite. Bauxite is relatively rare, but since it’s found all over the world in places like Brazil and China and India, it’s not hard to get your hands on some. The rest of the recipe for fireproof concrete is still under wraps because researchers are trying to patent their process.
The new cement, dubbed “Eco-cement,” is made from waste heat energy left over from electric plants. This type of energy is usually wasted, but the researchers behind this project were able to find a use for it.
“This is a very special type of cement because it has the potential to be environmentally friendly, but also has potentially huge commercial applications,” lead author Dr. Benjamin Sporton told BBC News.
They’re right. If this project works, it could potentially solve several different problems in one fell swoop: power plant waste heat and pollution would be reduced, and the construction industry could get its hands on an incredibly valuable product that could be used in a variety of ways.
The concrete hardens when exposed to temperatures above 123 degrees Fahrenheit (50 degrees Celsius), making it perfect for outdoor use where there’s a chance of rain or snow. The concrete also stays soft and malleable until heated, so it’s easy to transport and store.
Anyone who has ever tried to start a fire with wet wood knows that the process can be a little tricky. But oddly enough, there is a material that becomes more flammable when it gets wet.
Self-igniting cement may sound like some kind of new building material from the future, but it’s actually been around for thousands of years, thanks to its most famous user: the Ancient Romans. Known as Roman Cement (or opus caementicium), this ancient material was used in famous structures such as the Pantheon, and even in lesser known buildings such as the Pont du Gard aqueducts.
The concrete itself is made of volcanic ash and lime, which forms an incredibly durable material when combined with water. When dry, the material is quite brittle and weak, but when exposed to water it becomes incredibly strong. The problem with this type of cement is that it can also catch fire when wet.
In order to prevent this from happening, engineers would use clay waterproofing tiles on their roofing structures. If a fire did break out, firefighters could use these tiles to help put out the flames by soaking them in water and placing them on top of the burning building.